Shuttle



Patented Mar. 6, 1928.

' UNITED srA'Tas MILTON H. RUBIN, 01' NEW YORK, N. Y.

Application filed January 7, 1826. Serial No. 79,717.-

This invention relates to looms, and has to do more particularly withshuttles for automatic looms.

'In automatic looms, the bobbins in the shuttles are automaticallyremoved when the supply of thread is exhausted, and bobbins containing anew supply of thread are inserted in place. This changing of bobbins inthe shuttles takes place while the loom is in operation, and theshuttles are so constructed that the thread of the new bobbins isautomatically threaded through the eye of the shuttle by the movementsof the shuttle across the loom.

When a shuttle comes to a stop after a movement across the loom, thereoccurs a slack or looseness in the weft thread, and as a result thefabric which is woven has an uneven or rough appearance as distinguishedfrom the smooth and even appearance desired in fabric of high quality.

It is desirable to maintain a tension upon the thread during weaving andalso to take up the slack or looseness in the thread which occurs whenthe shuttle comes to a stop after a movement across the loom, and inproviding such a shuttle constructed to maintain a tension upon thethread and to take up the slack in the thread for use with automaticlooms, the thread tensioning and takeup device must be of such a naturethat it can be automatically threaded.

This invention is directed to the provision of an automaticallythreading shuttle, and it has to do more particularly with the provisionof an automatically threading shuttle so constructed that the slack orlooseness which occurs in the weft thread when the shuttle comes to astop after each pick will be taken up, and the thread held under tensionat all times.

In that embodiment of the invention which I prefer to employ, theshuttle contains the usual bobbin recess and eye through which thethread from the bobbin is drawn. -Within the shuttle and placed to actupon the thread between the bobbin and the eye is a tension and take-updevice comprising stationary and movable. thread engaging members. Thelatter are so formed that the thread is brought into engagement withthem as the shuttle is threaded by its movement across the loom, and

means 3 for receiving and holding a they are movable by suitable meansso as to put a tension on the thread and-also to take up any slack inthe thread at the end of the shuttle travel.

In the accompanying drawings is shown one form of the invention which isconsidered satisfactory and in these drawings:

Fig. 1s a perspective view of the shuttle; Flg. 2 1s a horizontalsection on line 2-2 of Flg. 3 showin various positions of the thread asit is bemg threaded through the shuttle eye and take-up device; Fig. 3is a vertical section taken on line 3-3 of Fig. 2; Flg. 4 is ahorizontal section taken through a portion of shuttle showin the weftthread threaded through the ta e-up device and out through the eye inoperating pos1't1on; Fig. 5 is a sectional view taken on line 5-5 ofFig. 2; Fig. 6 is asectional view taken on line 6-6 of Fig. 2. Referringto the drawings the shuttle 1 18 provided with a recess 2, and grippingobbin 4 upon which is wound a supply of weft thread 5. The thread 5 iswithdrawn from the bobbin and out through a suitable outlet or eye 10positioned adjacent one end of the shuttle. The up er surface of theoutlet end of the shatt e is closed as shown at 11, and a suitable slot12 is proyided through the closed surface 11. Leadlng from the slot 12is a passageway13 in which are mounted thread guiding members 14 and 15which are shaped to guide the thread toward the. eye but have a slighthook formation to prevent the reverse movement of the thread.

The shuttle operates back and forth across the loom, and when the threadsupply on the bobbing 4 becomes exhausted that bobbin is removed and anew bobbin is automatically inserted. The new bobbin is inserted whenthe shuttle is at rest in the shuttle box at one side of the machine,and the thread leading from the bobbin is made fast, so that upon thenext movement of the shuttle, which would be a movement from right toleft of the shuttle shown in Fig. 1, the weft thread takes the directionindicated by the full lines in Fig. 2 and is drawnthrough the slot 12.The shuttle then enters the box on the left side of the machine andcomes to a stop. Its

by reciprocating up device is positioned, which. consists of an arm 21fulcrumed at 22 and having an extension 23 which is acted upon by ares1l1- ent member 24 which may be a rubber band as shown in thedrawing, or a metal sprin member. Upon the arm 21 there are a number ofopen loops 30, three of which are shown. As shown in Figs. 5 and 6 eachloop is formed with an entrance end through which the thread passes asit enters the loop. This entrance end is formed by bending one end ofthe loop over the other to provide an entrance 31 having convergingwalls which direct the thread into the loop.

The overlapped ends of the loop prevent the thread from moving out ofthe loop through the entrance end. The normal position of .the arm 21 isbelow the slot 12 in the upper surface of the body of the shuttle, sothat the open ends of the loops are immediately below the slot. a

. After the insertion of a bobbin with a new sup ly of thread, and uponmovement of the s uttle across'the loom the thread is drawn through theslot 12 and at the same time it is drawn through the open ends 31 andinto the loops 30. Positioned within the cavity 20 are hooks 35 twoofwhich are shown. These hooks are provided with slanting surfaces 36 andare arranged at an angle so that when the arm 21 approaches the hooks 35by movement around its fulcrum 22 the arm 21 will be substantiallyparallel with a line drawn through the hook members. After the bobbinwith the new supply of thread has been inserted in the shuttle and theshuttle has moved across the loom drawing the weft thread through theslot 12 and in the open loops 30, the next 1novement of the shuttle isback across the loom which would be a movement from left to right of theshuttle shown in the drawing. On this second movement of the shuttle theweft thread is drawn through the passageway into the eye 10, and as thethread is under tension, it pulls the arm 21 around its fulcrum 22against the action of the resilient member 24, and the arm 21 takes theposition as shown in the dotted lines in Fig. 2. In this'position theopen loops 30 pass beyond the hook members 35 and as the loops pass thehooks the thread which extends through the loops is caused to slide overthe slanting surfaces 36 of the hooks 35, and to be engaged by thehooks. Thus the tension and take-up device is threaded at the time thethread is automatically threaded through the eye of the shuttle.

When the shuttle and take-up device are thus threaded the weft thread 5is drawn through the loops 30, under the hooks35' and then out throughthe eye 10 of the shuttle. As the shuttle moves across the loom thetension upon the weft thread pulls the arm 21 around. its pivot andagainst the action of the resilient member 24 until the member 21assumes a position similar to that shown in dotted lines in Fig. 2, thedegree to which the arm is pulled depending upon the strength of theresilient member. When the shuttle comes to rest at either side of theloom the resilient member 24 pulls the pivoted arm 21 in the oppositedirection and the open loops 30 co-operating with the hooks 35 cause thethread to take the position as indicated at Fig. .4, thus taking up. theslack in the thread and holding the thread under tension. This operationcontinues until the supply of thread upon the bobbin is exhaustedwhereupon the exhausted bobbin is removed and a bobbin with a new supplyof thread is inserted and the threading operation as above described isrepeated.

I claim:

1 1. A shuttle for automatic looms comprising a shuttle body having arecess for holding a bobbin, an opening through which the thread fromthe bobbin passes, and a thread tensioning and slack take-up devicemounted within the shuttle comprising a resiliently pivoted member,rings on said member into which the thread is directed formed with aturn-in hook to prevent dislodgment of the thread, a plurality of hookssecured within the shuttle body and adapted to engage the thread, and aspring member acting upon the pivoted member so as to restrain saidmember around its pivot against the pull of the thread and away from thehooks whereby a tension is maintained upon the thread.

2. Ina tension and slack take-up. device for loom shuttles comprising apivoted member having thread receiving rlngs through which the thread isautomatically passed, hooks formed within said rings to preventdislodgment of the thread, a resilient member constraining the pivotedmember to move around its pivot against the pull of the thread, andstationary hook members within the shuttle body adapted to engage thethread and cooperate with the rings so as to maintain atension upon thethread, said hooks havinginclined surfaces over which i the eye of theshuttle by the reciprocating movements of the shuttle, a threadtensioning and take-up device positioned within the shuttle including apivoted arm carrying rings, said rings being open to receive the threadupon one movement of the shuttle across the loom and closed againstdislodgment of the thread, and hooks secured to the shuttle body, saidhooks being formed to catch and hold the thread upon movement of 10 thepivoted arm during a reverse movement of the shuttle across the machinewhereby the thread is automatically held by the hooks.

In testimony whereof I affix my signature.

MILTON I-L- RUBIN.

